Mill Valley, Pennsylvania, Halloween night, 1968. After playing a joke on a school bully, Stella and her friends decide to sneak into a supposedly haunted house that once belonged to the powerful Bellows family, unleashing dark forces that they will be unable to control.
A father and teen daughter attend a pop concert, where they realize they're at the center of a dark and sinister event.
Zed and Addison are back at Seabrook High, where, after a groundbreaking semester, they continue to steer both their school and community toward unity. But the arrival of a new group of outsiders – mysterious werewolves – threatens to shake up the newfound peace and causes a rift in Zed and Addison’s budding romance.
